Billing note Voice gallery samples on this page were rendered with S2.1 Pro (same voice ids). Same price as S2.1 Pro — choose this model only for prompts already tuned on it.

Fish AudioFastHigh

Fish Audio S2 Pro

Fish Audio S2-generation TTS: 80+ languages, bracketed natural-language emotion and tone tags, Voice Library voices. Same price as S2.1 Pro; kept for pipelines tuned on S2. Billed per UTF-8 byte.

105 credits

per 1,000 Korean characters (0.034875 credits per UTF-8 byte; ~35 credits per 1,000 English characters)

80+ languages from a single model

Bracketed natural-language emotion and tone tags ([sad], [shouting], [sighing])

Voice Library voices via reference_id, plus cloned voices

Same price as S2.1 Pro — keep it for pipelines tuned on S2

mp3 / wav / opus output, speed and volume prosody control

Run it right now

Test this model instantly in the Console Playground — no code required

Use with AI Assistant

Copy usage instructions for Claude, ChatGPT, or other AI

llms.txtllms.txt ↗

Quick Start

curl -X POST "https://api.core.today/v1/predictions" \
  -H "Content-Type: application/json" \
  -H "X-API-Key: cdt_your_api_key" \
  -d '{
  "model": "fishaudio/s2-pro",
  "input": {
    "text": "안녕하세요, 코어닷투데이입니다. 하나의 API 키로 이미지, 영상, 음성 생성 모델을 모두 연결해 보세요.",
    "reference_id": "29da56534ac84ccd81092be4359a1639",
    "format": "mp3"
  }
}'

Voice Gallery

Showing 37 of 37

Every voice reads the same line. Play to compare timbre, then click an ID to copy it into reference_id.

Sample line (Korean): “안녕하세요, 코어닷투데이입니다. 하나의 API 키로 이미지, 영상, 음성 생성 모델을 모두 연결해 보세요.”— “Hi, this is Core.Today. One API key connects you to image, video and speech models.”

Fish Official Korean (15)

Designed by Fish rather than cloned from a person, so the rights position is the simplest here. Their registered descriptions are identical apart from gender and city, and the city is a label on the entry — nobody measured the accent — so pick these by ear.

지우F

Seoul female · chatbot replies and voice prompts

conversationalnatural

혜진F

Seoul female · chatbot replies and voice prompts

conversationalnatural

서윤F

Seoul female · chatbot replies and voice prompts

conversationalnatural

서연F

Seoul female · chatbot replies and voice prompts

conversationalnatural

하은F

Seoul female · chatbot replies and voice prompts

conversationalnatural

수아F

Registered as a Busan female conversational voice

conversationalregional

예린F

Registered as a Gyeongju female conversational voice

conversationalregional

유나F

Crisp young female · product and business narration

professionalclear

민준M

Seoul male · chatbot replies and voice prompts

conversationalnatural

시우M

Seoul male · chatbot replies and voice prompts

conversationalnatural

준서M

Seoul male · chatbot replies and voice prompts

conversationalnatural

도윤 (Doyoon)M

Seoul male · a different voice from Doyun below

conversationalnatural

도윤 (Doyun)M

Seoul male · a different voice from Doyoon above

conversationalnatural

재민M

Registered as a Busan male conversational voice

conversationalregional

태오M

Registered as a Gyeongju male conversational voice

conversationalregional

Korean community (18)

Uploaded by Fish users, and the place to look for a specific job — narration, shorts, advertising reads, interview hosting. Voices cloned from identifiable people are not listed here.

차분한 내레이션F

Documentary and reflective narration

calmclearprofessional

기본 나레이션 (남)M

News reads and educational narration

steadymeasuredauthoritative

부드러운 내레이터M

Warm storytelling and essay reads

warmgentleempathetic

다큐 나레이션F

Documentary and factual narration

calmprofessionalclear

긍정 아나운서F

Explainer videos and course narration

articulateprofessionalfriendly

따뜻한 여성F

Conversation and storytelling

warmrelaxedexpressive

20대 여성 (광고)F

Product ads and informational reads

smoothcalmpersuasive

나긋나긋 쇼츠F

Shorts and social clips

brightenergeticfriendly

효정 (팟캐스트)F

Podcasts and conversational content

smoothfriendlynatural

애덤 (광고)M

Advertising and promo reads

energeticconfidentpersuasive

유라F

Composed female narration

calmsmoothprofessional

진우M

Storytelling and long-form reads

calmsmoothnarrative

보이스1M

Entertainment and character lines

brightenergeticenthusiastic

30대 남자 인터뷰어M

Interview hosting and course content

calmclearfriendly

정보성 유튜버 (남)M

Fast-paced explainer videos

energeticfastconfident

20대 여성 쇼츠F

Beauty, tutorials and social

brightenergeticfriendly

호기요M

Educational content and narration

calmclearfriendly

성현M

Intimate conversation and ASMR

warmgentleintimate

Robot and character (4)

Registered as English, but measured on Korean: our gateway synthesized a Korean line, our own ASR transcribed it back, and the accuracy score is how closely that transcript matched (1.0 = exact). Voices that failed are not listed — one Spanish-registered robot scored 0.0 and produced no Korean at all.

장난꾸러기 로봇N

Playful robot character · Korean accuracy 0.97

high-pitchedenergeticmechanical

활기찬 로봇N

Game and animation robot · Korean accuracy 0.97

expressiveenergetichigh-pitched

레트로 컴퓨터M

Retro computer voice · Korean accuracy 0.94

monotoneelectronicretro

안내용 로봇M

Announcements and instructions · Korean accuracy 0.85

monotoneclearneutral

Parameters

Parameter	Type	Required	Default	Description
`text`	string	Yes	-	Text to synthesize (UTF-8). Billed by UTF-8 bytes — one Korean character is 3 bytes. Emotion, tone and effect cues go in brackets before the text they steer, e.g. [sad] I missed you, [shouting], [sighing], [long-break].
`reference_id`	string	No	2f06c7a428e9431fadd60af4dfe91763	Voice ID (32-hex id from the Fish Audio Voice Library). 37 curated voices (15 Fish Official Korean, 18 Korean community, 4 robot/character) can be previewed and copied from the Voice Gallery on this model's Core.Today Docs page (docs/models/fishaudio/…); any other public or cloned voice id works too — you are responsible for the rights to the voice you pass.
`format`	string	No	mp3	Output audio format. mp3wavopus
`mp3_bitrate`	integer	No	128	MP3 bitrate in kbps (mp3 only). 64128192
`speed`	number	No	1.0	Speaking rate multiplier, 0.5–2.0 (1.0 = default).
`volume`	number	No	0	Volume adjustment in dB, -20 to 20 (0 = default).
`latency`	string	No	balanced	balanced favors low latency (default); normal favors stability — a good choice for batch generation. balancednormal
`normalize`	boolean	No	true	Expand numbers, dates and units into spoken form.
`temperature`	number	No	0.7	Sampling temperature, 0.1–1.0. Lower is more consistent, higher more expressive.
`top_p`	number	No	0.7	Nucleus sampling probability mass, 0.1–1.0.
`chunk_length`	integer	No	200	Internal chunk length, 100–300. Affects phrasing of long passages.

Common Parameters

Common parameters used when calling POST /v1/predictions.

Parameter	Type	Required	Default	Description
`model`	string	Yes	-	Model identifier
`input`	object	Yes	-	Object containing the model-specific parameters from the table above
`output_folder`	string	No	-	Folder path for output files (max 256 chars, '..' not allowed)
`webhook_url`	string	No	-	Webhook URL to call on completion
`is_public`	boolean	No	false	If true, output files are also available via permanent public URLs

Examples

Core.Today intro

Same script as the voice gallery, rendered by S2 Pro.

curl -X POST "https://api.core.today/v1/predictions" \
  -H "Content-Type: application/json" \
  -H "X-API-Key: cdt_your_api_key" \
  -d '{
  "model": "fishaudio/s2-pro",
  "input": {
    "text": "안녕하세요, 코어닷투데이입니다. 하나의 API 키로 이미지, 영상, 음성 생성 모델을 모두 연결해 보세요.",
    "reference_id": "29da56534ac84ccd81092be4359a1639",
    "format": "mp3"
  }
}'

Emotion tags

Bracketed natural-language cues, same syntax as S2.1 Pro.

curl -X POST "https://api.core.today/v1/predictions" \
  -H "Content-Type: application/json" \
  -H "X-API-Key: cdt_your_api_key" \
  -d '{
  "model": "fishaudio/s2-pro",
  "input": {
    "text": "[calm] 오늘의 사용량 리포트를 읽어 드릴게요. [emphasis] 크레딧이 20% 남았습니다.",
    "reference_id": "d74f023d1525420797aed41b5d421c05"
  }
}'

Tips & Best Practices

1The 15 Fish Official Korean voices (지우, 민준, …) are designed by Fish rather than cloned from a person, which makes their rights position the simplest — a good baseline to compare against

2The 4 robot voices are registered as English but were measured on Korean: our gateway synthesized a Korean line and our own ASR transcribed it back at 0.85–0.97 similarity. Voices that failed that test are not in the gallery

3Voices cloned from named characters or identifiable voice actors are deliberately absent. You can still pass any reference_id to the API — the rights to that voice are yours to clear

4Prefer S2.1 Pro for new work — same price, better quality and latency; S2 Pro is here for pipelines already tuned on it

5Bracket tags work the same as S2.1 Pro: [happy], [whispering], [break]

6Korean is 3 UTF-8 bytes per character — 1,000 Korean characters cost about 105 credits

7The docs Voice Gallery samples were rendered with S2.1 Pro; the voice ids are identical, only the model differs

Use Cases

Korean narration for shorts, ads and explainer videos

Multilingual product voice-overs from one model

Audiobooks and long-form storytelling with emotion tags

Announcements and IVR prompts

Podcast intros and character voices

Model Info

ProviderFish Audio

Version-

CategoryAudio & TTS

Price105 credits

API Endpoint

POST /v1/predictions

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